package com.aerospace.springcloud.controller;

import com.aerospace.springcloud.entities.CommonResult;
import com.aerospace.springcloud.entities.Payment;
//import com.aerospace.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @Author: Aerospace
 * @Date: 2021/4/15 11:36
 * @Description: Dream begins
 */
@RestController
@Slf4j
public class OrderController {

//    public static final String PAYMENT_URL = "http://localhost:8001";
    /**
     * 通过在eureka上注册过的微服务名称调用
     */
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Autowired
    private RestTemplate restTemplate;
    /**
     * 自定义负载均衡规则
     */
//    @Resource
//    private LoadBalancer loadBalancer;
    @Resource
    private DiscoveryClient discoveryClient;
    /**
     * http://localhost/consumer/payment/create?serial=atguigu002
     *
     * @param payment
     * @return
     */
    @GetMapping("/consumer/payment/create")
    //这里两种方式一选择不带requestbody可以直接浏览器访问过来,但是不随带参数
    //通过postman可以带着参数请求过来
    public CommonResult<Payment> create(@RequestBody Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }

    /**
     * http://localhost/consumer/payment/get/31
     *
     * @param id
     * @return
     */
    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    /**
     * http://localhost/consumer/payment/getForEntity/31
     *
     * @param id
     * @return
     */
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()) {
            return entity.getBody();
        }
        return new CommonResult<>(444, "操作失败");
    }


    @ResponseBody
    @RequestMapping(value = "/get")
    public List<ServiceInstance> getRegister(){
        return discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
    }

    /**
     * 路由规则: 轮询
     * http://localhost/consumer/payment/payment/lb
     *
     * @return
     */
//    @GetMapping(value = "/consumer/payment/lb")
//    public String getPaymentLB() {
//        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
//        if (instances == null || instances.size() <= 0) {
//            return null;
//        }
//        ServiceInstance serviceInstance = loadBalancer.instances(instances);
//        URI uri = serviceInstance.getUri();
//        return restTemplate.getForObject(uri + "/payment/lb", String.class);
//    }

    @GetMapping("zipkin")
    public String paymentZipkin() {
        String result = restTemplate.getForObject("http://CLOUD-PAYMENT-SERVICE:8001"+"/zipkin/",String.class);
        return result;
    }
}
